A few years ago a judge ruled that the way the government calculated the emissions were incorrect, and now the government is basically forced to act. As these livestock farms account for a huge amount of nitrogen compound emissions, the most pain will be felt here. This was known for many years though, but now the reality is here and shit hit the fan.
In general, I think all this is also a symptom of the general distrust in the government, frustration that has been building up, and there’s quite some overlap in this protesting community and the “covid is a hoax” group. It attracts some very weird people.